This method is described in a series of papers:

• Aris-Brosou, S. and Z. Yang. 2002. The effects of models of rate evolution on estimation of divergence dates with a special reference to the metazoan 18S rRNA phylogeny. Syst. Biol. 51:703-714.

• Aris-Brosou, S. and Z. Yang. 2003. Bayesian models of episodic evolution support a late Precambrian explosive diversification of the Metazoa. Mol. Biol. Evol. 20:1947-1954.

• Aris-Brosou, S. 2003. How Bayes tests of molecular phylogenies compare with frequentist approaches. Bioinformatics. 19:618-624.